An action block that lists content on external storage.
The fiber will pause until the listing has completed.
The final directory level of path may contain glob patterns.
Note! File modification dates may not update correctly due to Android bug,
hence modified since may not work as expected.
- Path — path of directory to list.
- Modified since — only include content modified after this time.
- Content type — types of content to include, default is all content.
- Filenames — variable to assign the an array of paths to matching files in the Path directory.